Contents
7000-7044 C AC DB DT DF
7206C
7208-B
What is an angular contact bearing?
Angular contact ball bearings are rolling bearings that can simultaneously withstand radial and axial loads. The name "angular contact" comes from its design feature: there is a contact angle between the bearing raceway and the ball (rolling element).
Contact angle: The angle between the line connecting the contact point between the bearing ring and the steel ball and the radial plane of the bearing. This angle is crucial for the bearing to withstand axial loads.
Common contact angles: 15 ° (code C), 25 ° (code AC), 30 ° (code A), and 40 ° (code B). The larger the contact angle, the stronger the ability to withstand axial loads.
Working Principle
When axial force acts on a bearing, the angular contact decomposes this force into radial and axial components, allowing the bearing to withstand loads in both directions, which can be considered as combining the functions of deep groove ball bearings and thrust ball bearings.
Core Features
Capable of withstanding combined loads: able to withstand both radial and unidirectional axial forces simultaneously. This is its most important characteristic.
High speed capability: Due to the use of balls as rolling elements, their maximum speed is usually higher than that of roller bearings.
High rigidity: By preloading, internal clearance can be eliminated, the rigidity of the bearing system can be improved, and deformation under load can be reduced.
High rotational accuracy: Thanks to pre tensioning technology, angular contact bearings can provide very precise axial guidance, making them widely used in high-precision applications.
Usually used in pairs: a single angular contact bearing can only withstand axial force in one direction. In order to fix the bidirectional position of the shaft and withstand bidirectional axial forces, they usually need to be installed in pairs.
Main Installation and Configuration Methods
Due to the fact that a single angular contact bearing can only withstand unidirectional axial force, in practical applications, they are mainly paired and used in the following ways:
Back-to-back configuration
Characteristic: The wide end faces of the two bearings are installed relative to each other.
Advantages: Provides greater moment rigidity and can effectively resist overturning moments. The bearing pressure line is divergent, providing good stability.
Application: Suitable for applications that require high rigidity and resistance to complex torques, such as machine tool spindles, gearboxes, etc.
Face to face configuration
Characteristic: The narrow end faces of the two bearings are installed relative to each other.
Advantages: The pressure line of the bearing converges. The thermal elongation and installation error of the shaft are not as sensitive as back-to-back configurations, and the centering ability is slightly better.
Application: Suitable for situations where shaft thermal elongation or slightly poor neutrality may occur.
Serial configuration
Characteristic: Two bearings are installed in parallel in the same direction.
Advantages: Can bear axial loads from the same direction, significantly improving the axial load capacity in a single direction.
Applications: Suitable for large loads from unidirectional axial forces. Note that reverse axial forces can easily damage the series configuration, so using a third bearing to provide reverse support can be effective.
Pros and Cons
Advantages:
It has both radial and axial load-bearing capacity.
High speed, low friction.
High rigidity and precision can be achieved through pre tightening.
Smooth operation with low noise.
Disadvantages:
Usually requires paired use, which increases cost and installation complexity.
Sensitive to installation errors (such as misalignment).
Can only withstand unidirectional axial force (single bearing).
Manufacturing and adjusting (pre tightening) are more complex than deep groove ball bearings.
Main Application Areas
Angular contact bearings are the preferred choice for applications that require high speed, high precision, and high rigidit
1.Automotive sector: wheel hubs, differentials, turbochargers, and gearboxes.
2.Machine tool spindles: typical applications include the spindle systems of lathes, milling machines, and machining centers.
3.Aerospace: critical components such as engines and helicopter transmission systems.
4.Robotics: joints and reducer parts of robots.
5.Gear transmission devices.
6.Motors and pumps: such as centrifugal pumps and high-speed motors.
Conclusion
Angular contact bearings usually demonstrate strong performance during high-speed rotation and when subjected to substantial axial forces. At the same time, they offer a balance of precision, speed, and load-carrying capacity. When applications have these demands, angular contact bearings are undoubtedly the best choice.
